// Copyright 2011 Baptiste Lepilleur and The JsonCpp Authors

// Distributed under MIT license, or public domain if desired and

// recognized in your jurisdiction.

// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE

#if !defined(JSON_IS_AMALGAMATION)

#include <json/assertions.h>

#include <json/value.h>

#include <json/writer.h>

#endif // if !defined(JSON_IS_AMALGAMATION)

#include <math.h>

#include <sstream>

#include <utility>

#include <cstring>

#include <cassert>

#ifdef JSON_USE_CPPTL

#include <cpptl/conststring.h>

#endif

#include <cstddef> // size_t

#include <algorithm> // min()

#define JSON_ASSERT_UNREACHABLE assert(false)

namespace Json {

// This is a walkaround to avoid the static initialization of Value::null.

// kNull must be word-aligned to avoid crashing on ARM. We use an alignment of

// 8 (instead of 4) as a bit of future-proofing.

#if defined(__ARMEL__)

#define ALIGNAS(byte_alignment) __attribute__((aligned(byte_alignment)))

#else

#define ALIGNAS(byte_alignment)

#endif

//static const unsigned char ALIGNAS(8) kNull[sizeof(Value)] = { 0 };

//const unsigned char& kNullRef = kNull[0];

//const Value& Value::null = reinterpret_cast<const Value&>(kNullRef);

//const Value& Value::nullRef = null;

// static

Value const& Value::nullSingleton()

{

static Value const nullStatic;

return nullStatic;

}

// for backwards compatibility, we'll leave these global references around, but DO NOT

// use them in JSONCPP library code any more!

Value const& Value::null = Value::nullSingleton();

Value const& Value::nullRef = Value::nullSingleton();

const Int Value::minInt = Int(~(UInt(-1) / 2));

const Int Value::maxInt = Int(UInt(-1) / 2);

const UInt Value::maxUInt = UInt(-1);

#if defined(JSON_HAS_INT64)

const Int64 Value::minInt64 = Int64(~(UInt64(-1) / 2));

const Int64 Value::maxInt64 = Int64(UInt64(-1) / 2);

const UInt64 Value::maxUInt64 = UInt64(-1);

// The constant is hard-coded because some compiler have trouble

// converting Value::maxUInt64 to a double correctly (AIX/xlC).

// Assumes that UInt64 is a 64 bits integer.

static const double maxUInt64AsDouble = 18446744073709551615.0;

#endif // defined(JSON_HAS_INT64)

const LargestInt Value::minLargestInt = LargestInt(~(LargestUInt(-1) / 2));

const LargestInt Value::maxLargestInt = LargestInt(LargestUInt(-1) / 2);

const LargestUInt Value::maxLargestUInt = LargestUInt(-1);

#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

template <typename T, typename U>

static inline bool InRange(double d, T min, U max) {

// The casts can lose precision, but we are looking only for

// an approximate range. Might fail on edge cases though. ~cdunn

//return d >= static_cast<double>(min) && d <= static_cast<double>(max);

return d >= min && d <= max;

}

#else // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

static inline double integerToDouble(Json::UInt64 value) {

return static_cast<double>(Int64(value / 2)) * 2.0 + static_cast<double>(Int64(value & 1));

}

template <typename T> static inline double integerToDouble(T value) {

return static_cast<double>(value);

}

template <typename T, typename U>

static inline bool InRange(double d, T min, U max) {

return d >= integerToDouble(min) && d <= integerToDouble(max);

}

#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

/** Duplicates the specified string value.

* @param value Pointer to the string to duplicate. Must be zero-terminated if

* length is "unknown".

* @param length Length of the value. if equals to unknown, then it will be

* computed using strlen(value).

* @return Pointer on the duplicate instance of string.

*/

static inline char* duplicateStringValue(const char* value,

size_t length)

{

// Avoid an integer overflow in the call to malloc below by limiting length

// to a sane value.

if (length >= static_cast<size_t>(Value::maxInt))

length = Value::maxInt - 1;

char* newString = static_cast<char*>(malloc(length + 1));

if (newString == NULL) {

throwRuntimeError(

"in Json::Value::duplicateStringValue(): "

"Failed to allocate string value buffer");

}

memcpy(newString, value, length);

newString[length] = 0;

return newString;

}

/* Record the length as a prefix.

*/

static inline char* duplicateAndPrefixStringValue(

const char* value,

unsigned int length)

{

// Avoid an integer overflow in the call to malloc below by limiting length

// to a sane value.

JSON_ASSERT_MESSAGE(length <= static_cast<unsigned>(Value::maxInt) - sizeof(unsigned) - 1U,

"in Json::Value::duplicateAndPrefixStringValue(): "

"length too big for prefixing");

unsigned actualLength = length + static_cast<unsigned>(sizeof(unsigned)) + 1U;

char* newString = static_cast<char*>(malloc(actualLength));

if (newString == 0) {

throwRuntimeError(

"in Json::Value::duplicateAndPrefixStringValue(): "

"Failed to allocate string value buffer");

}

*reinterpret_cast<unsigned*>(newString) = length;

memcpy(newString + sizeof(unsigned), value, length);

newString[actualLength - 1U] = 0; // to avoid buffer over-run accidents by users later

return newString;

}

inline static void decodePrefixedString(

bool isPrefixed, char const* prefixed,

unsigned* length, char const** value)

{

if (!isPrefixed) {

*length = static_cast<unsigned>(strlen(prefixed));

*value = prefixed;

} else {

*length = *reinterpret_cast<unsigned const*>(prefixed);

*value = prefixed + sizeof(unsigned);

}

}

/** Free the string duplicated by duplicateStringValue()/duplicateAndPrefixStringValue().

*/

#if JSONCPP_USING_SECURE_MEMORY

static inline void releasePrefixedStringValue(char* value) {

unsigned length = 0;

char const* valueDecoded;

decodePrefixedString(true, value, &length, &valueDecoded);

size_t const size = sizeof(unsigned) + length + 1U;

memset(value, 0, size);

free(value);

}

static inline void releaseStringValue(char* value, unsigned length) {

// length==0 => we allocated the strings memory

size_t size = (length==0) ? strlen(value) : length;

memset(value, 0, size);

free(value);

}

#else // !JSONCPP_USING_SECURE_MEMORY

static inline void releasePrefixedStringValue(char* value) {

free(value);

}

static inline void releaseStringValue(char* value, unsigned) {

free(value);

}

#endif // JSONCPP_USING_SECURE_MEMORY

} // namespace Json

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// ValueInternals...

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

#if !defined(JSON_IS_AMALGAMATION)

#include "json_valueiterator.inl"

#endif // if !defined(JSON_IS_AMALGAMATION)

namespace Json {

Exception::Exception(JSONCPP_STRING const& msg)

: msg_(msg)

{}

Exception::~Exception() JSONCPP_NOEXCEPT

{}

char const* Exception::what() const JSONCPP_NOEXCEPT

{

return msg_.c_str();

}

RuntimeError::RuntimeError(JSONCPP_STRING const& msg)

: Exception(msg)

{}

LogicError::LogicError(JSONCPP_STRING const& msg)

: Exception(msg)

{}

JSONCPP_NORETURN void throwRuntimeError(JSONCPP_STRING const& msg)

{

throw RuntimeError(msg);

}

JSONCPP_NORETURN void throwLogicError(JSONCPP_STRING const& msg)

{

throw LogicError(msg);

}

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// class Value::CommentInfo

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

Value::CommentInfo::CommentInfo() : comment_(0)

{}

Value::CommentInfo::~CommentInfo() {

if (comment_)

releaseStringValue(comment_, 0u);

}

void Value::CommentInfo::setComment(const char* text, size_t len) {

if (comment_) {

releaseStringValue(comment_, 0u);

comment_ = 0;

}

JSON_ASSERT(text != 0);

JSON_ASSERT_MESSAGE(

text[0] == '\0' || text[0] == '/',

"in Json::Value::setComment(): Comments must start with /");

// It seems that /**/ style comments are acceptable as well.

comment_ = duplicateStringValue(text, len);

}

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// class Value::CZString

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// Notes: policy_ indicates if the string was allocated when

// a string is stored.

Value::CZString::CZString(ArrayIndex aindex) : cstr_(0), index_(aindex) {}

Value::CZString::CZString(char const* str, unsigned ulength, DuplicationPolicy allocate)

: cstr_(str) {

// allocate != duplicate

storage_.policy_ = allocate & 0x3;

storage_.length_ = ulength & 0x3FFFFFFF;

}

Value::CZString::CZString(const CZString& other) {

cstr_ = (other.storage_.policy_ != noDuplication && other.cstr_ != 0

? duplicateStringValue(other.cstr_, other.storage_.length_)

: other.cstr_);

storage_.policy_ = static_cast<unsigned>(other.cstr_

? (static_cast<DuplicationPolicy>(other.storage_.policy_) == noDuplication

? noDuplication : duplicate)

: static_cast<DuplicationPolicy>(other.storage_.policy_)) & 3U;

storage_.length_ = other.storage_.length_;

}

#if JSON_HAS_RVALUE_REFERENCES

Value::CZString::CZString(CZString&& other)

: cstr_(other.cstr_), index_(other.index_) {

other.cstr_ = nullptr;

}

#endif

Value::CZString::~CZString() {

if (cstr_ && storage_.policy_ == duplicate) {

releaseStringValue(const_cast<char*>(cstr_), storage_.length_ + 1u); //+1 for null terminating character for sake of completeness but not actually necessary

}

}

void Value::CZString::swap(CZString& other) {

std::swap(cstr_, other.cstr_);

std::swap(index_, other.index_);

}

Value::CZString& Value::CZString::operator=(const CZString& other) {

cstr_ = other.cstr_;

index_ = other.index_;

return *this;

}

#if JSON_HAS_RVALUE_REFERENCES

Value::CZString& Value::CZString::operator=(CZString&& other) {

cstr_ = other.cstr_;

index_ = other.index_;

other.cstr_ = nullptr;

return *this;

}

#endif

bool Value::CZString::operator<(const CZString& other) const {

if (!cstr_) return index_ < other.index_;

//return strcmp(cstr_, other.cstr_) < 0;

// Assume both are strings.

unsigned this_len = this->storage_.length_;

unsigned other_len = other.storage_.length_;

unsigned min_len = std::min<unsigned>(this_len, other_len);

JSON_ASSERT(this->cstr_ && other.cstr_);

int comp = memcmp(this->cstr_, other.cstr_, min_len);

if (comp < 0) return true;

if (comp > 0) return false;

return (this_len < other_len);

}

bool Value::CZString::operator==(const CZString& other) const {

if (!cstr_) return index_ == other.index_;

//return strcmp(cstr_, other.cstr_) == 0;

// Assume both are strings.

unsigned this_len = this->storage_.length_;

unsigned other_len = other.storage_.length_;

if (this_len != other_len) return false;

JSON_ASSERT(this->cstr_ && other.cstr_);

int comp = memcmp(this->cstr_, other.cstr_, this_len);

return comp == 0;

}

ArrayIndex Value::CZString::index() const { return index_; }

//const char* Value::CZString::c_str() const { return cstr_; }

const char* Value::CZString::data() const { return cstr_; }

unsigned Value::CZString::length() const { return storage_.length_; }

bool Value::CZString::isStaticString() const { return storage_.policy_ == noDuplication; }

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// class Value::Value

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

// //////////////////////////////////////////////////////////////////

/*! \internal Default constructor initialization must be equivalent to:

* memset( this, 0, sizeof(Value) )

* This optimization is used in ValueInternalMap fast allocator.

*/

Value::Value(ValueType vtype) {

static char const emptyString[] = "";

initBasic(vtype);

switch (vtype) {

case nullValue:

break;

case intValue:

case uintValue:

value_.int_ = 0;

break;

case realValue:

value_.real_ = 0.0;

break;

case stringValue:

// allocated_ == false, so this is safe.

value_.string_ = const_cast<char*>(static_cast<char const*>(emptyString));

break;

case arrayValue:

case objectValue:

value_.map_ = new ObjectValues();

break;

case booleanValue:

value_.bool_ = false;

break;

default:

JSON_ASSERT_UNREACHABLE;

}

}

Value::Value(Int value) {

initBasic(intValue);

value_.int_ = value;

}

Value::Value(UInt value) {

initBasic(uintValue);

value_.uint_ = value;

}

#if defined(JSON_HAS_INT64)

Value::Value(Int64 value) {

initBasic(intValue);

value_.int_ = value;

}

Value::Value(UInt64 value) {

initBasic(uintValue);

value_.uint_ = value;

}

#endif // defined(JSON_HAS_INT64)

Value::Value(double value) {

initBasic(realValue);

value_.real_ = value;

}

Value::Value(const char* value) {

initBasic(stringValue, true);

JSON_ASSERT_MESSAGE(value != NULL, "Null Value Passed to Value Constructor");

value_.string_ = duplicateAndPrefixStringValue(value, static_cast<unsigned>(strlen(value)));

}

Value::Value(const char* beginValue, const char* endValue) {

initBasic(stringValue, true);

value_.string_ =

duplicateAndPrefixStringValue(beginValue, static_cast<unsigned>(endValue - beginValue));

}

Value::Value(const JSONCPP_STRING& value) {

initBasic(stringValue, true);

value_.string_ =

duplicateAndPrefixStringValue(value.data(), static_cast<unsigned>(value.length()));

}

Value::Value(const StaticString& value) {

initBasic(stringValue);

value_.string_ = const_cast<char*>(value.c_str());

}

#ifdef JSON_USE_CPPTL

Value::Value(const CppTL::ConstString& value) {

initBasic(stringValue, true);

value_.string_ = duplicateAndPrefixStringValue(value, static_cast<unsigned>(value.length()));

}

#endif

Value::Value(bool value) {

initBasic(booleanValue);

value_.bool_ = value;

}

Value::Value(Value const& other)

: type_(other.type_), allocated_(false)

,

comments_(0), start_(other.start_), limit_(other.limit_)

{

switch (type_) {

case nullValue:

case intValue:

case uintValue:

case realValue:

case booleanValue:

value_ = other.value_;

break;

case stringValue:

if (other.value_.string_ && other.allocated_) {

unsigned len;

char const* str;

decodePrefixedString(other.allocated_, other.value_.string_,

&len, &str);

value_.string_ = duplicateAndPrefixStringValue(str, len);

allocated_ = true;

} else {

value_.string_ = other.value_.string_;

allocated_ = false;

}

break;

case arrayValue:

case objectValue:

value_.map_ = new ObjectValues(*other.value_.map_);

break;

default:

JSON_ASSERT_UNREACHABLE;

}

if (other.comments_) {

comments_ = new CommentInfo[numberOfCommentPlacement];

for (int comment = 0; comment < numberOfCommentPlacement; ++comment) {

const CommentInfo& otherComment = other.comments_[comment];

if (otherComment.comment_)

comments_[comment].setComment(

otherComment.comment_, strlen(otherComment.comment_));

}

}

}

#if JSON_HAS_RVALUE_REFERENCES

// Move constructor

Value::Value(Value&& other) {

initBasic(nullValue);

swap(other);

}

#endif

Value::~Value() {

switch (type_) {

case nullValue:

case intValue:

case uintValue:

case realValue:

case booleanValue:

break;

case stringValue:

if (allocated_)

releasePrefixedStringValue(value_.string_);

break;

case arrayValue:

case objectValue:

delete value_.map_;

break;

default:

JSON_ASSERT_UNREACHABLE;

}

delete[] comments_;

value_.uint_ = 0;

}

Value& Value::operator=(Value other) {

swap(other);

return *this;

}

void Value::swapPayload(Value& other) {

ValueType temp = type_;

type_ = other.type_;

other.type_ = temp;

std::swap(value_, other.value_);

int temp2 = allocated_;

allocated_ = other.allocated_;

other.allocated_ = temp2 & 0x1;

}

void Value::copyPayload(const Value& other) {

type_ = other.type_;

value_ = other.value_;

allocated_ = other.allocated_;

}

void Value::swap(Value& other) {

swapPayload(other);

std::swap(comments_, other.comments_);

std::swap(start_, other.start_);

std::swap(limit_, other.limit_);

}

void Value::copy(const Value& other) {

copyPayload(other);

comments_ = other.comments_;

start_ = other.start_;

limit_ = other.limit_;

}

ValueType Value::type() const { return type_; }

int Value::compare(const Value& other) const {

if (*this < other)

return -1;

if (*this > other)

return 1;

return 0;

}

bool Value::operator<(const Value& other) const {

int typeDelta = type_ - other.type_;

if (typeDelta)

return typeDelta < 0 ? true : false;

switch (type_) {

case nullValue:

return false;

case intValue:

return value_.int_ < other.value_.int_;

case uintValue:

return value_.uint_ < other.value_.uint_;

case realValue:

return value_.real_ < other.value_.real_;

case booleanValue:

return value_.bool_ < other.value_.bool_;

case stringValue:

{

if ((value_.string_ == 0) || (other.value_.string_ == 0)) {

if (other.value_.string_) return true;

else return false;

}

unsigned this_len;

unsigned other_len;

char const* this_str;

char const* other_str;

decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);

decodePrefixedString(other.allocated_, other.value_.string_, &other_len, &other_str);

unsigned min_len = std::min<unsigned>(this_len, other_len);

JSON_ASSERT(this_str && other_str);

int comp = memcmp(this_str, other_str, min_len);

if (comp < 0) return true;

if (comp > 0) return false;

return (this_len < other_len);

}

case arrayValue:

case objectValue: {

int delta = int(value_.map_->size() - other.value_.map_->size());

if (delta)

return delta < 0;

return (*value_.map_) < (*other.value_.map_);

}

default:

JSON_ASSERT_UNREACHABLE;

}

return false; // unreachable

}

bool Value::operator<=(const Value& other) const { return !(other < *this); }

bool Value::operator>=(const Value& other) const { return !(*this < other); }

bool Value::operator>(const Value& other) const { return other < *this; }

bool Value::operator==(const Value& other) const {

// if ( type_ != other.type_ )

// GCC 2.95.3 says:

// attempt to take address of bit-field structure member `Json::Value::type_'

// Beats me, but a temp solves the problem.

int temp = other.type_;

if (type_ != temp)

return false;

switch (type_) {

case nullValue:

return true;

case intValue:

return value_.int_ == other.value_.int_;

case uintValue:

return value_.uint_ == other.value_.uint_;

case realValue:

return value_.real_ == other.value_.real_;

case booleanValue:

return value_.bool_ == other.value_.bool_;

case stringValue:

{

if ((value_.string_ == 0) || (other.value_.string_ == 0)) {

return (value_.string_ == other.value_.string_);

}

unsigned this_len;

unsigned other_len;

char const* this_str;

char const* other_str;

decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);

decodePrefixedString(other.allocated_, other.value_.string_, &other_len, &other_str);

if (this_len != other_len) return false;

JSON_ASSERT(this_str && other_str);

int comp = memcmp(this_str, other_str, this_len);

return comp == 0;

}

case arrayValue:

case objectValue:

return value_.map_->size() == other.value_.map_->size() &&

(*value_.map_) == (*other.value_.map_);

default:

JSON_ASSERT_UNREACHABLE;

}

return false; // unreachable

}

bool Value::operator!=(const Value& other) const { return !(*this == other); }

const char* Value::asCString() const {

JSON_ASSERT_MESSAGE(type_ == stringValue,

"in Json::Value::asCString(): requires stringValue");

if (value_.string_ == 0) return 0;

unsigned this_len;

char const* this_str;

decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);

return this_str;

}

#if JSONCPP_USING_SECURE_MEMORY

unsigned Value::getCStringLength() const {

JSON_ASSERT_MESSAGE(type_ == stringValue,

"in Json::Value::asCString(): requires stringValue");

if (value_.string_ == 0) return 0;

unsigned this_len;

char const* this_str;

decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);

return this_len;

}

#endif

bool Value::getString(char const** str, char const** cend) const {

if (type_ != stringValue) return false;

if (value_.string_ == 0) return false;

unsigned length;

decodePrefixedString(this->allocated_, this->value_.string_, &length, str);

*cend = *str + length;

return true;

}

JSONCPP_STRING Value::asString() const {

switch (type_) {

case nullValue:

return "";

case stringValue:

{

if (value_.string_ == 0) return "";

unsigned this_len;

char const* this_str;

decodePrefixedString(this->allocated_, this->value_.string_, &this_len, &this_str);

return JSONCPP_STRING(this_str, this_len);

}

case booleanValue:

return value_.bool_ ? "true" : "false";

case intValue:

return valueToString(value_.int_);

case uintValue:

return valueToString(value_.uint_);

case realValue:

return valueToString(value_.real_);

default:

JSON_FAIL_MESSAGE("Type is not convertible to string");

}

}

#ifdef JSON_USE_CPPTL

CppTL::ConstString Value::asConstString() const {

unsigned len;

char const* str;

decodePrefixedString(allocated_, value_.string_,

&len, &str);

return CppTL::ConstString(str, len);

}

#endif

Value::Int Value::asInt() const {

switch (type_) {

case intValue:

JSON_ASSERT_MESSAGE(isInt(), "LargestInt out of Int range");

return Int(value_.int_);

case uintValue:

JSON_ASSERT_MESSAGE(isInt(), "LargestUInt out of Int range");

return Int(value_.uint_);

case realValue:

JSON_ASSERT_MESSAGE(InRange(value_.real_, minInt, maxInt),

"double out of Int range");

return Int(value_.real_);

case nullValue:

return 0;

case booleanValue:

return value_.bool_ ? 1 : 0;

default:

break;

}

JSON_FAIL_MESSAGE("Value is not convertible to Int.");

}

Value::UInt Value::asUInt() const {

switch (type_) {

case intValue:

JSON_ASSERT_MESSAGE(isUInt(), "LargestInt out of UInt range");

return UInt(value_.int_);

case uintValue:

JSON_ASSERT_MESSAGE(isUInt(), "LargestUInt out of UInt range");

return UInt(value_.uint_);

case realValue:

JSON_ASSERT_MESSAGE(InRange(value_.real_, 0, maxUInt),

"double out of UInt range");

return UInt(value_.real_);

case nullValue:

return 0;

case booleanValue:

return value_.bool_ ? 1 : 0;

default:

break;

}

JSON_FAIL_MESSAGE("Value is not convertible to UInt.");

}

#if defined(JSON_HAS_INT64)

Value::Int64 Value::asInt64() const {

switch (type_) {

case intValue:

return Int64(value_.int_);

case uintValue:

JSON_ASSERT_MESSAGE(isInt64(), "LargestUInt out of Int64 range");

return Int64(value_.uint_);

case realValue:

JSON_ASSERT_MESSAGE(InRange(value_.real_, minInt64, maxInt64),

"double out of Int64 range");

return Int64(value_.real_);

case nullValue:

return 0;

case booleanValue:

return value_.bool_ ? 1 : 0;

default:

break;

}

JSON_FAIL_MESSAGE("Value is not convertible to Int64.");

}

Value::UInt64 Value::asUInt64() const {

switch (type_) {

case intValue:

JSON_ASSERT_MESSAGE(isUInt64(), "LargestInt out of UInt64 range");

return UInt64(value_.int_);

case uintValue:

return UInt64(value_.uint_);

case realValue:

JSON_ASSERT_MESSAGE(InRange(value_.real_, 0, maxUInt64),

"double out of UInt64 range");

return UInt64(value_.real_);

case nullValue:

return 0;

case booleanValue:

return value_.bool_ ? 1 : 0;

default:

break;

}

JSON_FAIL_MESSAGE("Value is not convertible to UInt64.");

}

#endif // if defined(JSON_HAS_INT64)

LargestInt Value::asLargestInt() const {

#if defined(JSON_NO_INT64)

return asInt();

#else

return asInt64();

#endif

}

LargestUInt Value::asLargestUInt() const {

#if defined(JSON_NO_INT64)

return asUInt();

#else

return asUInt64();

#endif

}

double Value::asDouble() const {

switch (type_) {

case intValue:

return static_cast<double>(value_.int_);

case uintValue:

#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

return static_cast<double>(value_.uint_);

#else // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

return integerToDouble(value_.uint_);

#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

case realValue:

return value_.real_;

case nullValue:

return 0.0;

case booleanValue:

return value_.bool_ ? 1.0 : 0.0;

default:

break;

}

JSON_FAIL_MESSAGE("Value is not convertible to double.");

}

float Value::asFloat() const {

switch (type_) {

case intValue:

return static_cast<float>(value_.int_);

case uintValue:

#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

return static_cast<float>(value_.uint_);

#else // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

// This can fail (silently?) if the value is bigger than MAX_FLOAT.

return static_cast<float>(integerToDouble(value_.uint_));

#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)

case realValue:

return static_cast<float>(value_.real_);

case nullValue:

return 0.0;

case booleanValue:

return value_.bool_ ? 1.0f : 0.0f;

default:

break;

}

JSON_FAIL_MESSAGE("Value is not convertible to float.");

}

bool Value::asBool() const {

switch (type_) {

case booleanValue:

return value_.bool_;

case nullValue:

return false;

case intValue:

return value_.int_ ? true : false;

case uintValue:

return value_.uint_ ? true : false;

case realValue:

// This is kind of strange. Not recommended.

return (value_.real_ != 0.0) ? true : false;

default:

break;

}

JSON_FAIL_MESSAGE("Value is not convertible to bool.");

}

bool Value::isConvertibleTo(ValueType other) const {

switch (other) {

case nullValue:

return (isNumeric() && asDouble() == 0.0) ||

(type_ == booleanValue && value_.bool_ == false) ||

(type_ == stringValue && asString().empty()) ||

(type_ == arrayValue && value_.map_->size() == 0) ||

(type_ == objectValue && value_.map_->size() == 0) ||

type_ == nullValue;

case intValue:

return isInt() ||

(type_ == realValue && InRange(value_.real_, minInt, maxInt)) ||

type_ == booleanValue || type_ == nullValue;

case uintValue:

return isUInt() ||

(type_ == realValue && InRange(value_.real_, 0, maxUInt)) ||

type_ == booleanValue || type_ == nullValue;

case realValue:

return isNumeric() || type_ == booleanValue || type_ == nullValue;

case booleanValue:

return isNumeric() || type_ == booleanValue || type_ == nullValue;

case stringValue:

return isNumeric() || type_ == booleanValue || type_ == stringValue ||

type_ == nullValue;

case arrayValue:

return type_ == arrayValue || type_ == nullValue;

case objectValue:

return type_ == objectValue || type_ == nullValue;

}

JSON_ASSERT_UNREACHABLE;

return false;

}

/// Number of values in array or object

ArrayIndex Value::size() const {

switch (type_) {

case nullValue:

case intValue:

case uintValue:

case realValue:

case booleanValue:

case stringValue:

return 0;

case arrayValue: // size of the array is highest index + 1

if (!value_.map_->empty()) {

ObjectValues::const_iterator itLast = value_.map_->end();

--itLast;

return (*itLast).first.index() + 1;

}

return 0;

case objectValue:

return ArrayIndex(value_.map_->size());

}

JSON_ASSERT_UNREACHABLE;

return 0; // unreachable;

}

bool Value::empty() const {

if (isNull() || isArray() || isObject())

return size() == 0u;

else

return false;

}

Value::operator bool() const { return ! isNull(); }

void Value::clear() {

JSON_ASSERT_MESSAGE(type_ == nullValue || type_ == arrayValue ||

type_ == objectValue,

"in Json::Value::clear(): requires complex value");

start_ = 0;

limit_ = 0;

switch (type_) {

case arrayValue:

case objectValue:

value_.map_->clear();

break;

default:

break;

}

}

void Value::resize(ArrayIndex newSize) {

JSON_ASSERT_MESSAGE(type_ == nullValue || type_ == arrayValue,

"in Json::Value::resize(): requires arrayValue");

if (type_ == nullValue)

*this = Value(arrayValue);

ArrayIndex oldSize = size();

if (newSize == 0)

clear();

else if (newSize > oldSize)

(*this)[newSize - 1];

else {

for (ArrayIndex index = newSize; index < oldSize; ++index) {

value_.map_->erase(index);

}

JSON_ASSERT(size() == newSize);

}

}